This map cannot and will not replace your GPS. However, GPS capability was limited in Puerto Rico when it came to identifying locations, such as restaurants, places to see etc. I have a nuvi, with map updates. it was great to get me around the island. I did not get lost. If you have been there before, you should know, many streets has no street signs to identify them. Almost everyone uses land marks! Anyway, GPS was great IF I KNEW where I wanted to go! This map tells you what's available and where you should go. I always checked the location in the map and inputted in GPS to get me there.Map is cheap, delivers fast and it is USEFUL. It shows point of interests, lists historical and tourist sites, identifies beaches, land marks, reveals hidden jewels in PR. You should not be wasting money if you buy this map.